16-anhydro-b-D-Glucose (Levoglucosan) is an anhydrohexose that is the 16-anhydro-derivative of beta-D-glucopyranose. It is formed from the pyrolysis of carbohydrates such as starch and cellulose. Levoglucosan can also be utilized in the synthesis of chiral polymers such as unhydrolysable glucose polymers.

3-O-beta-D-Glucopyranosylplatycodigenin is isolated from the roots of Platycodon grandiflorum.

Pyrocatechol its sulfonic acid is often present in the urine of many mammals. Small amounts of catechol occur naturally in fruits and vegetables along with the enzyme polyphenol oxidase. Upon mixing the enzyme with the substrate and exposure to oxygen (as when a potato or apple is cut) the colorless catechol oxidizes to reddish-brown benzoquinone derivatives.